Version 0.1
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Batteryless telephone system with public address mode BLTS-1006
All telephones ensure control (according to scheme – electric circuit switch) over
external signaling units and repeat (if necessary) incoming call with light and (or) sound
signaling. Connections of signaling units are shown in Figure 6.
Signaling units (to repeat incoming call signaling) shall be powered from the power
mains.
All telephones have LED light indicator of power status when power is supplied
from the power source.
All telephones have controls backlight which switches on automatically once the
power is supplied from external source.
Use telephones on open deck only mounted in cabinet BLTS2-BO.
2.1.3
External communication devices
Communication devices ensure freedom to move around workplace, as well hear-
ing protection against increased noise (decreasing level of acoustic disturbance due to
people’s work and surrounding mechanisms). The System includes helmets with throat
microphones allowing for communication in means of respiratory protection.
The System includes the following external communication devices:
– headsets;
– microphone-telephone intercom helmets, summer and winter types;
– throat microphone-telephone intercom helmets, summer and winter types.
Headsets are based on steel headband and may be adjusted individually for con-
venient use. Headsets are equipped with noise-protected microphone for operation in
noisy environment.
Intercom helmets are used in conditions of increased noise to protect user’s hear-
ing organ. They are equipped with microphones having low noise sensitivity or throat
microphones.
The System’s intercom helmets are produced in three sizes: I, II or III. Specify a
required size at order.
Headsets and intercom helmets ensure two-way communication when connected
to сommutator telephones and telephones.
Headsets and intercom helmets are equipped with switching device PTT type that
connects / disconnects the device and сommutator telephone (telephone).
